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v2.4.1.9

Consolidated Balance Sheets (Parentheticals) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Preferred Stock, Shares Authorized | 20,000,000 us-gaap_PreferredStockSharesAuthorized | 20,000,000 us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Dividend Rate, Percentage | 6.90%us-gaap_PreferredStockDividendRatePercentage | 6.90%us-gaap_PreferredStockDividendRatePercentage
Preferred Stock, Shares Issued | 4,000,000 us-gaap_PreferredStockSharesIssued | 4,000,000 us-gaap_PreferredStockSharesIssued
Preferred Stock, Shares Outstanding | 4,000,000 us-gaap_PreferredStockSharesOutstanding | 4,000,000 us-gaap_PreferredStockSharesOutstanding
Preferred Stock, Par or Stated Value Per Share | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare
Common Stock, Par or Stated Value Per Share | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, Shares Authorized | 400,000,000 us-gaap_CommonStockSharesAuthorized | 400,000,000 us-gaap_CommonStockSharesAuthorized
Common Stock, Shares, Issued | 179,745,598 us-gaap_CommonStockSharesIssued | 179,293,160 us-gaap_CommonStockSharesIssued
Common Stock, Shares, Outstanding | 179,745,598 us-gaap_CommonStockSharesOutstanding | 179,293,160 us-gaap_CommonStockSharesOutstanding
Common shares in grantor trust | 694,691 bdn_CommonSharesInGrantorTrust | 384,536 bdn_CommonSharesInGrantorTrust
BRANDYWINE OPERATING PARTNERSHIP, L.P. |  |
Preferred Stock, Dividend Rate, Percentage | 6.90%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 6.90%us-gaap_PreferredStockDividendRatePercentage / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Preferred Stock, Shares Issued | 4,000,000 us-gaap_PreferredStockSharesIssued / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4,000,000 us-gaap_PreferredStockSharesIssued / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Preferred Stock, Shares Outstanding | 4,000,000 us-gaap_PreferredStockSharesOutstanding / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 4,000,000 us-gaap_PreferredStockSharesOutstanding / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Redeemable Limited Partnership Units Issued | 1,535,102 bdn_RedeemableLimitedPartnershipUnitsIssued / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 1,535,102 bdn_RedeemableLimitedPartnershipUnitsIssued / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Redeemable Limited Partnership Units Outstanding | 1,535,102 bdn_RedeemableLimitedPartnershipUnitsOutstanding / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 1,535,102 bdn_RedeemableLimitedPartnershipUnitsOutstanding / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
General Partners' Capital Account, Units Issued | 179,745,598 us-gaap_GeneralPartnersCapitalAccountUnitsIssued / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 179,293,160 us-gaap_GeneralPartnersCapitalAccountUnitsIssued / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
General Partners' Capital Account, Units Outstanding | 179,745,598 us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 179,293,160 us-gaap_GeneralPartnersCapitalAccountUnitsOutstanding / dei_LegalEntityAxis = us-gaap_SubsidiariesMember

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- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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